我正在尝试使用复合Swing组件作为菜单的一部分.
一切工作正常,除了一个细节：该组件包含JComboBoxes,每当用户点击其中一个打开其下拉列表时,下拉列表打开但菜单消失.单击JComboBox时是否可以使菜单保持打开状态？
public class FilterMenu extends JMenu {
public FilterMenu(String name) {
super(name);
final JPopupMenu pm = this.getPopupMenu();
final FilterPanel filterPanel = new FilterPanel(pm) {
@Override
public void updateTree() {
super.updateTree();
pm.pack();
}
};
pm.add(filterPanel);
}
}
FilterPanel是自定义复合组件.调用pm.pack()以在filterPanel大小改变时调整JPopupMenu的大小.
谢谢你的帮助
解决方法
你的意思是
this bug
import javax.swing.*;
import java.awt.event.*;
public class Test {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(400,400);
frame.setVisible(true);
String[] list = {"1","2","3","4",};
JComboBox comb = new JComboBox(list);
final JPopupMenu pop = new JPopupMenu();
pop.add(comb);
frame.addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
System.out.println("mousePressed");
pop.show(e.getComponent(),e.getX(),e.getY());
}
});
}
}
